Structural arrangement in pneumatic floor spring

ABSTRACT

A structural arrangement is described m pneumatic floor spring of reduced dimensions, which requires a hole in the floor for its installation, providing a shielded structure that prevents the water accumulation, such pneumatic floor spring keeps the door ( 100 ) closed by the force exerted by the plunger ( 80 ) and when the door is opened, the pin ( 30 ) spins along with the cam ( 60 ) which, with the double helicoid, pushes the descendant track ( 70 ) and the plunger ( 80 ).

The present utility model describes a STRUCTURAL ARRANGEMENT IN PNEUMATIC FLOOR SPRING. More specifically, it includes a floor spring to pneumatic glass and wooden doors.

Floor springs make the door automatic opening and closing, with the minimum effort, for both sides, having for both sides a fixed stop function, maintaining the door stopped at one point at about 90 degrees and the return to the door closing occurs lightly and gently.

The state-of-the-art describes hydraulic springs applied on glass doors and air springs on wooden doors that ensure the door smooth closing, without the risk of hitting the mark, also allowing the door retention in a 90 degrees angle of aperture. However, for the hydraulic floor spring installation it is necessary to concrete the spring box on the floor, affecting the floor aesthetics. Also, the hydraulic springs have a high cost, sometimes higher than the door cost, which makes its application in several projects impracticable.

Therefore, the object of this utility model is a pneumatic floor spring of reduced dimensions, which requires a hole in the floor for its installation, providing a shielded structure that prevents the water accumulation, a situation observed in the hydraulic floor springs that do not feature a shielded structure, being subject to oxidation.

A feature of the utility model is a STRUCTURAL ARRANGEMENT IN PNEUMATIC FLOOR SPRING with reduced dimensions compared to the state-of-the-art hydraulic springs, with minimal aesthetic interference in the environment where it will be installed.

A feature of the utility model is a STRUCTURAL ARRANGEMENT IN PNEUMATIC FLOOR SPRING of low cost due to the assembly simplicity.

A feature of the utility model is a STRUCTURAL ARRANGEMENT IN PNEUMATIC FLOOR SPRING which installation time is extremely reduced in view of requiring just a hole in the floor for the positioning of the metal plate that makes up the spring, unlike the state-of-the-art which requires to break the floor with tools, making a cut of about 300 mm, in an operation that takes about 2 hours and a half.

A feature of the utility model is a STRUCTURAL ARRANGEMENT IN PNEUMATIC FLOOR SPRING of little weight compared to the hydraulic floor springs, with 0.285 grams on average, unlike the 3 to 6 kilograms of hydraulic springs.

In order to better describe the technical features of the pneumatic floor spring structural arrangement, the following figures are presented:

FIG. 1 shows the exploded view of the pneumatic floor spring.

FIG. 2 shows the assembled view.

FIG. 3 shows the cutaway view.

FIG. 4 shows the pneumatic floor spring installed in a door, and FIG. 4A shows the floor spring detail in the door opening operation.

FIG. 5 shows the pneumatic floor spring installed in a door, and FIG. 5A shows the floor spring detail in the door closing operation.

The STRUCTURAL ARRANGEMENT IN PNEUMATIC FLOOR SPRING, object of the present utility model, comprises a tube (10) with an opening at the ends, and with a lid in one of the ends (20) welded to such tube (10).

The lid (20) has a centralized thru-hole (21) where an extension pin (30) is externally projected, located inside the tube (10) to the door fitting, such pin (30) positioned in a bushing (40) and seated by an o'ring (50).

On the opposite end to the pin projection (30) there is a salience for a coupling cam with double helicoid (60) supported on the opposite face in track (70) that fits in the tube grooves (10), blocking such track (70).

This superior set formed by the pin (30), cam (60) and track (70) is pushed upwards by the plunger (80) from a pressurized low chamber (90), such plunger (80) which at one end rests at the track base (70) and, on the opposite side, features a support ring (100) and a guide ring (110) sealed by the gasket (120) and o'ring (130), sealed on the base (11) of the tube (10) positioned on the opposite end to the lid (14) seated by an o'ring (140).

The tube (10) features an opening on the surface (12) provided with a lid for the oil supply.

In operation, the door assembled on the pin (30) is kept closed by the force exerted by the plunger (80). When the door is opened, the pin (30) spins along with the cam (60) which, with the double helicoid, pushes the descendant track (70) and the plunger (80), as shown in FIG. 4A. When the door is released before completing the 90 degrees opening, the door is closed by the pressure exerted by the pressurized chamber (90) on the plunger (80) that pushes up the track (70) that turns back the cam (60) and the pin (30) until the bottom of the track (70) where it is kept closed, as shown in FIG. 5A.

If the door (100) is open to 90 degrees, a flat area of the double helicoid keeps the track (70) and cam (60) is blocked.

Being the pneumatic floor spring installed in the center of the door (100), the door leaf opens to 360°. 

1. STRUCTURAL ARRANGEMENT IN PNEUMATIC FLOOR SPRING comprising a tube (10) with an opening on the surface (12) provided with a lid for the oil supply, such tube (10) with opening at the ends and with one of the ends fitted with a lid (20) welded to such tube (10), such lid (20) which features a centralized thru-hole (21) where externally projects an extension pin (30) positioned in the inner tube (10) for the door fitting (100), such pin (30) positioned on a bushing (40) and sealed by an o'ring (50), featured by the fact the opposite end to the pin projection (30) has a salience for a coupling cam with double helicoid (60) supported on the face opposite in a track (70) which fits in the tube grooves (10), blocking such track (70), such upper set formed by the pin (30), cam (60) and track (70) is pushed upward by the plunger (80) of a pressurized low chamber (90), such plunger (80) that at one end rests at the track base (70) and on the opposite side features a support ring (100) and a guide ring (110) seated by the gasket (120) and o'ring (130), seated on the base (11) of the tube (10) positioned on the opposite end to the lid (14) seated by an o'ring (140). 